I have googled POE and it seems to be anywhere from 44v to 57v can anyone confirm this?

i dont want to use POE but i do want to put 12v DC threw the cat 6 cable from an LED Driver to the LED strip that i want to place on the back of two monitors and a TV. my thoughts are if the cable can handle the 12v i can use the RJ45 connectors so i can still remove the monitors and TV off the wall if i needed to for any reason without taking the LEDs off or having to a long cable hang down

EDIT: i forgot to add that the cable will only be used for the LED lights so could use all 8 cores for power (4 for + and 4 for -)